/****************************************************************************
**
** Copyright (C) 2010 Tieto Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Tieto Corporation (info.ostrava@tieto.com)
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** Commercial Usage
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Tieto.
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** rights.  These rights are described in the Tieto Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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#include <QtGui/QLabel>
#include <QtGui/QAction>
#include <QtGui/QHBoxLayout>
#include <QtGui/QMessageBox>
#include <QtGui/QMenu>
#include <QtGui/QFileDialog>
#include <QtGui/QContextMenuEvent>
#include <QtGui/QPushButton>
#include <QDebug>

#include "areaindexingpage.h"
#include "areaindexingmodel.h"
#include "imageview.h"
#include "backgroundtaskwatcher.h"
#include "common.h"

AreaIndexingPage::AreaIndexingPage(AreaIndexingModel &model, QWidget *parent) :
    QWizardPage(parent),
    _model(model)
{
    setTitle(tr("Area indexing"));
    setSubTitle(tr("Index areas in provided image."
                   "Indexed areas are filled with different collor"));

    createActions();

    detectedAreasView = new ImageView(AreaIndexingModel::EDetectedAreasImage);
    detectedAreasView->setToolTip(tr("Detected areas"));
    detectedAreasView->setModel(&_model);

    QVBoxLayout *detectedAreasImageLayout = new QVBoxLayout;
    detectedAreasImageLayout->addWidget(detectedAreasView);
    detectedAreasImageLayout->setStretch(0, 1);

    indexedAreasView = new ImageView(AreaIndexingModel::EIndexedAreasImage);
    indexedAreasView->setToolTip(tr("Indexed areas"));
    indexedAreasView->setModel(&_model);

    QPushButton *indexButton = new QPushButton();
    indexButton->setText(tr("Index"));
    indexButton->setToolTip(tr("Area indexing"));

    QObject::connect(indexButton, SIGNAL(clicked()), this, SLOT(indexArea()));

    QVBoxLayout *indexLayout = new QVBoxLayout;
    indexLayout->addWidget(indexedAreasView);
    indexLayout->addWidget(indexButton);
    indexLayout->setStretch(0, 1);

    QHBoxLayout *areaIndexinglayout = new QHBoxLayout;
    areaIndexinglayout->addLayout(detectedAreasImageLayout);
    areaIndexinglayout->addLayout(indexLayout);
    areaIndexinglayout->setStretch(0, 1);
    areaIndexinglayout->setStretch(1, 1);

    QLabel *stepsLabel = new QLabel();
    stepsLabel->setText(tr("1. Area Indexing"));
    stepsLabel->setAlignment(Qt::AlignLeft | Qt::AlignTop);
    stepsLabel->setWordWrap(true);

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(stepsLabel);
    layout->addLayout(areaIndexinglayout);
    layout->setStretch(0, 1);
    layout->setStretch(1, 4);
    this->setLayout(layout);
}

void AreaIndexingPage::initializePage()
{

}

bool AreaIndexingPage::validatePage()
{
    if (_model.indexedAreasImage().isNull()) {
        indexArea();
    }
    return true;
}

void AreaIndexingPage::contextMenuEvent(QContextMenuEvent *event)
{
    QMenu menu(this);
    menu.addAction(indexAct);
    menu.addAction(aboutAct);
    menu.exec(event->globalPos());
}

void AreaIndexingPage::indexArea()
{
    qDebug() << "AreaIndexingPage::indexArea";            
    AreaIndexingTask *task = _model.indexAreas();
    if (task) {
        BackgroundTaskWatcher watcher(task, tr("Area indexing"));        
        watcher.exec();        
    }
}

void AreaIndexingPage::about()
{
    qDebug() << "AreaIndexingPage::about";
    QMessageBox::about(this, tr("Area indexing"),
            tr("1. Area indexing."));
}

void AreaIndexingPage::createActions()
{
    indexAct = new QAction(tr("&Indexing"), this);
    indexAct->setShortcuts(QKeySequence::Print);
    indexAct->setStatusTip(tr("Detects areas in provided image"));
    QObject::connect(indexAct, SIGNAL(triggered()), this, SLOT(indexArea()));

    aboutAct = new QAction(tr("&About"), this);
    aboutAct->setStatusTip(tr("Show the application's About box"));
    QObject::connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
}
